:root { --bg:#0b0f14; --card:#141a22; --text:#e8eef5; --muted:#9aa8b8; --accent:#5b8cff; --line:#243041; }
* { box-sizing: border-box; }
body { margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; background:var(--bg); color:var(--text); line-height:1.55; }
.wrap { max-width:760px; margin:0 auto; padding:40px 20px 80px; }
h1 { font-size:1.85rem; line-height:1.2; margin:0 0 12px; }
h2 { font-size:1.15rem; }
.lead { color:var(--muted); font-size:1.05rem; margin:0 0 24px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:14px; padding:20px 22px; margin:16px 0; }
a { color:var(--accent); }
.nav { color:var(--muted); font-size:0.9rem; margin-bottom:28px; }
.nav a { color:var(--muted); text-decoration:none; }
.nav a:hover { color:var(--text); }
.btn { display:inline-block; background:var(--accent); color:#fff !important; text-decoration:none; padding:12px 18px; border-radius:10px; font-weight:600; }
.btn.secondary { background:transparent; border:1px solid var(--line); color:var(--text) !important; }
.muted { color:var(--muted); font-size:0.92rem; }
footer { margin-top:40px; color:var(--muted); font-size:0.85rem; border-top:1px solid var(--line); padding-top:18px; }

/* Article pages */
.article h2 { margin-top: 1.6em; margin-bottom: 0.55em; }
.article h3 { font-size: 1.05rem; margin-top: 1.35em; margin-bottom: 0.45em; }
.article hr { border: 0; border-top: 1px solid var(--line); margin: 1.6em 0; }
.article ul, .article ol { padding-left: 1.25rem; margin: 0.6em 0 1em; }
.article li { margin: 0.25em 0; }
.article p { margin: 0.75em 0; }
.table-wrap { overflow-x: auto; margin: 1em 0 1.25em; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; background: rgba(0,0,0,0.18); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
pre.tree { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; overflow-x: auto; font-size: 0.85rem; line-height: 1.45; color: var(--muted); }
pre.tree code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9em; }